Northeastern States. Full-grown larvae are about 27 mm. long. 
They are light green with a reddish stripe on each side of the 
head, reddish patches on the back, and a red stripe on each side 
of the body. Winter is spent in the larval stage. The related 
species, D. variolaria (Guen.), is found on willow and trembling 
aspen in the Northeastern States and southwestern Canada. 
Physostegania pustularia (Guen,) occurs on red maple in 
Maine where it is occasionally abundant. It has also been reported 
from widely scattered localities in southern Canada. The adult 
has a wingspread of about 25 mm. and is pure white except for 
four brownish spots on the margin of the forewing. Full-grown 
larvae are green and about 15 mm. long. There are two whitish 
lines down the back, bordered by yellowish-white lines; the skin 
is quite wrinkled. Larvae are present during May and June. 
Semiothisa granitata (Guen.), the green spruce looper, feeds on 
the foliage of various conifers such as white pine, spruce, fir, 
and hemlock in the Northeastern States and southeastern Canada. 
Full-grown larvae are about 20 mm. long. The body is light green 
with brownish tinges on top, and there are two light longitudinal 
lines on the back. The winter is spent in the pupal stage in 
the duff. S. ocellinata (Guen.) occurs in the Northeastern and 
Lake States and feeds on honey and black locusts. Full-grown 
larvae are green except for faint wavy lines of red and are 
about 25 mm. long. S. bisignata (Wlk.) occurs in southern Can- 
ada and the Northeastern States and feeds principally on white 
pine. S. sexamaculata Pack., a widely distributed species, feeds 
on larch. 
Eufidonia notataria (Walker) occurs on white pine in the At- 
lantic Coastal States. In southern Canada, it has been observed 
mainly on balsam fir and spruce. Full-grown larvae are deep 
green and about 25 mm. long. There is a light, colored line on 
the dorsum and two stripes along each side. Larvae are present 
from July to September, and winter is spent in the pupal stage. 
Melanolophia canadaria (Guen.) feeds on the foliage of various 
hardwoods and conifers such as basswood, paper birch, ash, hem- 
lock, larch, pine, and spruce in the United States and Canada. 
Full-grown larvae are about 30 mm. long. The body has a broken, 
purplish line on the top and yellowish stripe suffused with pur- 
plish red on each side. Larvae are present from June to early 
August, and winter is spent in the larval stage in the ground. 
Anacamptodes ephyraria (Walker) has been observed feeding 
on hemlock in the Northeastern States and on several hardwoods 
in Canada. Full-grown larvae are greenish with reddish-brown 
tinges and are about 20 mm. long. The head is bilobed and wider 
than the thorax, and the second abdominal segment is usually 
swollen at the sides. Winter is probably spent in the egg stage. 
A. larvaria (Guen.) feeds on aspen, paper birch, and alder in the 
Northeastern States and southern Canada. Full-grown larvae are 
yellowish-green and about 30 mm. long. There is a reddish band 
on the second abdominal segment, several reddish blotches on 
the dorsum, and a pair of blunt tubercles on the eighth abdominal 
segment. A. pergacilis (Hulst) feeds on cypress in the South. 
During a recent outbreak in Arkansas, several thousand acres 
were defoliated. 
338 
